脱式计算.( 5 6 + 7 12 + 3 8 )÷ 1 48 9×3.6+2.9×
脱式计算.(56+712+38)÷1489×3.6+2.9×6.4(29+56-3536)×367.25-337+3.75-6470.75×99+0.753.6-2.8+...
脱式计算.( 5 6 + 7 12 + 3 8 )÷ 1 48 9×3.6+2.9×6.4 ( 2 9 + 5 6 - 35 36 )×36 7.25-3 3 7 +3.75-6 4 7 0.75×99+0.75 3.6-2.8+7.4-6.2
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(1)(
=(
=
=40+28+18, =68+18, =86; (2)9×3.6+2.9×6.4, =32.4+18.56, =50.96; (3)(
=
=8+30-35, =38-35, =3; (4)7.25-3
=(7.25+3.75)-(3
=11-10, =1; (5)0.75×99+0.75, =0.75×(99+1), =0.75×100, =75; (6)3.6-2.8+7.4-6.2, =(3.6+7.4)-(2.8+6.2), =11-9, =2. |
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