Question

0.5×0.18+12.5×0.18简便计算

1250x0.037＋0.125x160＋12.5x2.7 0.45x72＋45x0.18+4.5
1250x0.037＋0.125x160＋12.5x2.7
0.45x72＋45x0.18+4.5
求这2道题的简便计算方法.

Answer 1

=12.5×3.7+12.5×1.6+12.5×2.7
=12.5×（3.7+1.6+2.7）
=12.5×8
=100
=4.5×7.2+4.5×1.8+4.5
=4.5×（7.2+1.8+1）
=4.5×10
=45