优质解答
1、直接写出得数.
0.45×2.5=1.125 0.8×1.25=1 0.3×3.6=1.08 0.3×0.3=0.09 10×0.07= 0.7 0.92×0.4= 0.368 0.2×0.26=0.052 0.14×4= 0.56 0.02×0.1= 0.002 1.2×0.3= 0.362.5×0.4= 1 2.4×5= 12 0.22×4= 0.88 3.25×0=0
0.9-0.52= 0.38 3.99×1=3.99 0×3.52= 0 12.5×8=100
8÷10 = 0.8 10-1.8-7.2= 1 0.43+3.57= 4 2.5×4×12=144
0.9×0.8= 0.72 7.5x-3x = 4.5x a+3a+7a== 11a 1.05×100= 105 1÷0.5= 2 0.96÷3= 0.32
0.56×100= 56 3.78×100= 378 4÷0.8 =5
3.215×100= 321.5 0.8×10= 8 4.08×100= 408 1.1×0.2 =0.22
0.6×0.8 = 0.48 3×0.9= 2.7 2.5×0.4= 1
0.16×5 = 0.8 1.78+2.2 = 3.98 1.2×0.5-0.4 = 0.2 0.7÷0.01 = 70 2.5×0.4 = 1 12-3.9= 8.1 1.25×8÷1.25 = 8 6.6÷0.66 = 10 5.37×0+4.63 =4.63 3.9+2.03= 5.93
7.2+2.8=10 1.4×5= 7
2、用竖式计算
0.18×15= 0.025×14= 3.06×36=
0.04×0.12= 3.84×2.6≈ 5.76×3=
(保留一位小数)
16.9÷0.13 1.55÷3.9 3.7×0.016
13.76×0.8= 5.2×0.6 8.4×1.3
6.4×0.5 4.48×0.4 5.25×5
35.4×4.2 0.042×0.54 0.76×0.32
0.12×0.5×0.16= 4.8×0.25= 0.125×1.4≈
(保留两位小数)
2.5÷0.7= (保留三位小数) 10.1÷3.3= (商用循环小数)
10.75÷12.5= (用乘法验算) 3.25×9.04= (用除法验算)
3、脱式计算(能简算的要简算)
2.5×7.1×4 16.12×99+16.12 5.2×0.9+0.9
7.28×99+7.28 4.3×50×0.2 64-2.64×0.5
26×15.7+15.7×24 (2.275 +0.625)×0.28
3.94+34.3×0.2 1.2×(9.6÷2.4)÷4.8
8.9×1.1×4.7 2.7×5.4×3.9 3.6×9.85-5.46
8.05×3.4+7.6 6.58×4.5×0.9 2.8×0.5+1.58
32+4.9-0.9 4.8-4.8×0.5 (1.25-0.125)×8
4.8×100.1 56.5×99+56.5 7.09×10.8-0.8×7.09
4.85 + 0.35 ÷ 1.4 8.7 × 17.4 - 8.7 × 7.4
12.5×0.4×2.5×8 0.87×3.16+4.64 9.5×101
0.68 ÷(5.2 -3.5)× 1.25
40.5 ÷ 0.81 × 0.18 4.8 ×(15 ÷ 2.4) 2.13.×0.×8257
6.81+6.81×99 0.25×185×40 4.4×0.8-3.4×0.8
(9.37+9.37+9.37+9.37)× 2.5 4.2.×1.+1.×1.75
2.37×6.3+2.37×3.7 2.5×1.25×0.32 3.8×10.1
2.5×(3.8×0.04) 7.69×101 3.8×10.1
0.25×39+0.25 0.125×72 46×0.33+54×0.33
(8×5.27) ×1.25 6.81+6.81×99 0.25×185×40
6.8×0.75÷0.5 3.75÷0.125–2.75 1.53+23.4÷7.2
9.5×99 13.5×0.98 12.5×8.8
脱式计算(能简算的要简算)
7.28×99+7.28 4.3×50×0.2 64-2.64×0.5
26×15.7+15.7×24 (2.275 +0.625)×0.28
3.94+34.3×0.2 1.2×(9.6÷2.4)÷4.8
1、直接写出得数.
0.45×2.5=1.125 0.8×1.25=1 0.3×3.6=1.08 0.3×0.3=0.09 10×0.07= 0.7 0.92×0.4= 0.368 0.2×0.26=0.052 0.14×4= 0.56 0.02×0.1= 0.002 1.2×0.3= 0.362.5×0.4= 1 2.4×5= 12 0.22×4= 0.88 3.25×0=0
0.9-0.52= 0.38 3.99×1=3.99 0×3.52= 0 12.5×8=100
8÷10 = 0.8 10-1.8-7.2= 1 0.43+3.57= 4 2.5×4×12=144
0.9×0.8= 0.72 7.5x-3x = 4.5x a+3a+7a== 11a 1.05×100= 105 1÷0.5= 2 0.96÷3= 0.32
0.56×100= 56 3.78×100= 378 4÷0.8 =5
3.215×100= 321.5 0.8×10= 8 4.08×100= 408 1.1×0.2 =0.22
0.6×0.8 = 0.48 3×0.9= 2.7 2.5×0.4= 1
0.16×5 = 0.8 1.78+2.2 = 3.98 1.2×0.5-0.4 = 0.2 0.7÷0.01 = 70 2.5×0.4 = 1 12-3.9= 8.1 1.25×8÷1.25 = 8 6.6÷0.66 = 10 5.37×0+4.63 =4.63 3.9+2.03= 5.93
7.2+2.8=10 1.4×5= 7
2、用竖式计算
0.18×15= 0.025×14= 3.06×36=
0.04×0.12= 3.84×2.6≈ 5.76×3=
(保留一位小数)
16.9÷0.13 1.55÷3.9 3.7×0.016
13.76×0.8= 5.2×0.6 8.4×1.3
6.4×0.5 4.48×0.4 5.25×5
35.4×4.2 0.042×0.54 0.76×0.32
0.12×0.5×0.16= 4.8×0.25= 0.125×1.4≈
(保留两位小数)
2.5÷0.7= (保留三位小数) 10.1÷3.3= (商用循环小数)
10.75÷12.5= (用乘法验算) 3.25×9.04= (用除法验算)
3、脱式计算(能简算的要简算)
2.5×7.1×4 16.12×99+16.12 5.2×0.9+0.9
7.28×99+7.28 4.3×50×0.2 64-2.64×0.5
26×15.7+15.7×24 (2.275 +0.625)×0.28
3.94+34.3×0.2 1.2×(9.6÷2.4)÷4.8
8.9×1.1×4.7 2.7×5.4×3.9 3.6×9.85-5.46
8.05×3.4+7.6 6.58×4.5×0.9 2.8×0.5+1.58
32+4.9-0.9 4.8-4.8×0.5 (1.25-0.125)×8
4.8×100.1 56.5×99+56.5 7.09×10.8-0.8×7.09
4.85 + 0.35 ÷ 1.4 8.7 × 17.4 - 8.7 × 7.4
12.5×0.4×2.5×8 0.87×3.16+4.64 9.5×101
0.68 ÷(5.2 -3.5)× 1.25
40.5 ÷ 0.81 × 0.18 4.8 ×(15 ÷ 2.4) 2.13.×0.×8257
6.81+6.81×99 0.25×185×40 4.4×0.8-3.4×0.8
(9.37+9.37+9.37+9.37)× 2.5 4.2.×1.+1.×1.75
2.37×6.3+2.37×3.7 2.5×1.25×0.32 3.8×10.1
2.5×(3.8×0.04) 7.69×101 3.8×10.1
0.25×39+0.25 0.125×72 46×0.33+54×0.33
(8×5.27) ×1.25 6.81+6.81×99 0.25×185×40
6.8×0.75÷0.5 3.75÷0.125–2.75 1.53+23.4÷7.2
9.5×99 13.5×0.98 12.5×8.8
脱式计算(能简算的要简算)
7.28×99+7.28 4.3×50×0.2 64-2.64×0.5
26×15.7+15.7×24 (2.275 +0.625)×0.28
3.94+34.3×0.2 1.2×(9.6÷2.4)÷4.8