4.56+37+4.44+47
=4.56+4.44 + 37+47
=9+84
=93
.
23－九分之八×八分之三÷二十七分之一
=23 - 3分之1×27
=23- 9
=14
.
3.07×101－3.07
=3.07×（101-1）
=3.07×100
=307
.
8.92×7.9+2.1×8.92+28.9
=8.92×（7.9+2.1）+28.9
=8.92×10+28.9
=89.2 + 28.9
=90 - 0.8 + 28 + 0.9
=118 +0.1
=118.1
.
9/10×5/9+4/9×9/10+9/10
=(9/10)×(5/9+4/9 +1)
=(9/10)×2
=9/5
=1又4/5 4.56+37+4.44+47
=4.56+4.44 + 37+47
=9+84
=93
.
23－九分之八×八分之三÷二十七分之一
=23 - 3分之1×27
=23- 9
=14
.
3.07×101－3.07
=3.07×（101-1）
=3.07×100
=307
.
8.92×7.9+2.1×8.92+28.9
=8.92×（7.9+2.1）+28.9
=8.92×10+28.9
=89.2 + 28.9
=90 - 0.8 + 28 + 0.9
=118 +0.1
=118.1
.
9/10×5/9+4/9×9/10+9/10
=(9/10)×(5/9+4/9 +1)
=(9/10)×2
=9/5
=1又4/5