问题
解答题
下面各题怎样简便就怎样计算 ①5.02-1.37-2.63 ②
③1.25×2.5×32 ④11÷〔
|
答案
①5.02-1.37-2.63
=5.02-(1.37+2.63)
=5.02-4
=1.02;
②
×(12 5
+5 6
)+0.81 2
=
×12 5
+5 6
×12 5
+0.81 2
=2+1.2+0.8
=4;
③1.25×2.5×32
=1.25×2.5×(8×4)
=(1.25×8)×(2.5×4)
=10×10
=100;
④11÷〔
×(6 11
+3 4
)〕1 6
=11÷[
×6 11
]9+2 12
=11÷1 2
=11×2
=22.