问题
解答题
选择你喜欢的方法计算 (1)4500+500÷25 (2)907×101-907 (2)0.5×[12.2÷(3.7+2.4] (4)(
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答案
(1)4500+500÷25,
=4500+20,
=4520;
(2)907×101-907,
=907×(101-1),
=907×100,
=90700;
(2)0.5×[12.2÷(3.7+2.4)],
=0.5×[12.2÷6.1],
=0.5×2,
=1;
(4)(
+3 8
)×40+1 5
,7 15
=
×40+3 8
×40+1 5
,7 15
=15+8+
,7 15
=23
.7 15