问题
解答题
用简便方法计算.
9×37+9×63
0.9+1.08+0.92+0.1
8×5×125×40
1.38+1.75+0.25.
答案
(1)9×37+9×63,
=9×(37+63),
=9×100,
=900;
(2)0.9+1.08+0.92+0.1,
=(0.9+0.1)+(1.08+0.92),
=1+2,
=3;
(3)8×5×125×40,
=(8×125)×(5×40),
=1000×200,
=200000;
(4)1.38+1.75+0.25,
=1.38+(1.75+0.25),
=1.38+2,
=3.38.