优质解答
1: ⑴ 除法 1.6 加法
⑵ 乘法 3.78
⑶ 2.3 3.7
⑷ 0.4 2.5
⑸ 2
2: 5千克=5000克
(5000÷500)×1.8
=10×1.8
=18
3: (50-17.6)÷4.5
=32.4÷4.5
=7.2
4: (50.8-12.8)÷2
=38÷2
=19
12.8×19=243.2
5: 97.5÷5÷1×1×3
=58.5
6: ⑴ 12÷0.5-9÷1.5
=24-6
=18
⑵ (12÷0.5)÷(9÷1.5)
=24÷6
=4
7: (21.5-9)÷2.5+3
=12.5÷2.5+3
=5+3
=8
以后这么简单的数学题还是自己做好啦
1: ⑴ 除法 1.6 加法
⑵ 乘法 3.78
⑶ 2.3 3.7
⑷ 0.4 2.5
⑸ 2
2: 5千克=5000克
(5000÷500)×1.8
=10×1.8
=18
3: (50-17.6)÷4.5
=32.4÷4.5
=7.2
4: (50.8-12.8)÷2
=38÷2
=19
12.8×19=243.2
5: 97.5÷5÷1×1×3
=58.5
6: ⑴ 12÷0.5-9÷1.5
=24-6
=18
⑵ (12÷0.5)÷(9÷1.5)
=24÷6
=4
7: (21.5-9)÷2.5+3
=12.5÷2.5+3
=5+3
=8
以后这么简单的数学题还是自己做好啦