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
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+ 1 4 ×99 (3) ( 5 6 - 5 8 )×24 (4) 121×100 1 121 (5) 15÷3-7×( 1 7 + 1 21 ) (6) 24 6 23 ÷6- 1 23 .
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(1)13.6×3-40.6÷2, =40.8-20.3, =20.5; (2) 99×0.75+
=99×(0.75+0.25), =99×1, =99; (3) (
=
=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
=4
=4. |
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