小学五年级奥数（简便计算）

2024-11-25 01:22:32

推荐回答（3个）

回答1：

4.7×2.8+3.6×9.4
=4.7×2.8+3.6×2×4.7
=4.7×（2.8+7.2）
=4.7×10
=47
0.525÷13.125÷4×85.2
=0.525÷（13.125×4）×85.2
=0.525÷52.5×85.2
=0.01×85.2
=0.852

回答2：

4.7×2.8+3.6×9.4
=4.7*2.8+3.6*2*4.7
=4.7*（2.8+3.6*2）
=4.7*（2.8+7.2）
=4.7*10
=47
0.525÷13.125÷4×85.2
=0.525/（13.125*4）*85.2
=0.525/52.5*85.2=0.01*85.2
=.852

回答3：

4.7×2.8+3.6×9.4=4.7×2.8+3.6x4.7x2=4.7x(2.8+7.2)=47

0.525÷13.125÷4×85.2=0.525÷(13.125x4)×85.2=0.525÷52.5×85.2=0.01×85.2=0.852