Question

1.8×4.6+3.6×2.7怎么巧算？

Answer 1

1.8×4.6+3.6×2.7=1.8×4.6+1.8×2×2.7=1.8×4.6+1.8×5.4=1.8×（4.6+5.4）=1.8×10=18

Answer 2

先观察，1.8和3.6是倍数，
可以选择把4.6拆成2x2.3或者把3.6拆成2x1.8
1.8×4.6+3.6×2.7
=1.8x4.6+1.8x（2x2.7）=1.8x（4.6+5.4）=18
或=1.8x2x2.3+3.6x2.7=3.6x（2.3+2.7）=18

Answer 3

1.8×4.6+3.6×2.7
=1.8×(4.6+2×2.7)
=1.8×(4.6+5.4)
=1.8×10
=18

Answer 4

根据题意，解答如下
原式=1.8x2x2.3+3.6x2.7
=3.6x（2.3+2.7）
=3.6x5
=180

Answer 5

1.8×4.6+3.6×2.7
=1.8×4.6+1.8×2×2.7
=1.8×4.6+1.8×5.4
=1.8×（4.6+5.4）
=1.8×10
=18