脱式计算.(能用简便方法计算的要用简便方法计算) (1)13.6×3-40.6÷2 (2)99×0.75+14×99 (3
脱式计算.(能用简便方法计算的要用简便方法计算)(1)13.6×3-40.6÷2(2)99×0.75+14×99(3)(56?58)×24(4)121×1001121(5...
脱式计算.(能用简便方法计算的要用简便方法计算) (1)13.6×3-40.6÷2 (2)99×0.75+14×99 (3)(56?58)×24 (4)121×1001121 (5)15÷3?7×(17+121) (6)24623÷6?123.
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推荐于2016-10-17
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(1)13.6×3-40.6÷2,
=40.8-20.3,
=20.5;
(2)
99×0.75+×99,
=99×(0.75+0.25),
=99×1,
=99;
(3)
(?)×24,
=
×24-
×24,
=20-15,
=5;
(4)
121×100,
=121×(100+
),
=121×100+121×
,
=12100+1,
=12101;
(5)
15÷3?7×(+),
=15÷3-7×
,
=5-1
,
=3
;
(6)
24÷6?,
=4
-
,
=4.
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