脱式计算[1-( 1 3 + 1 5 )]× 5 26 13 4 +7÷(
脱式计算[1-(13+15)]×526134+7÷(3712-138)408+540÷18×2446×2.2÷(3.3+5.9)...
脱式计算[1-( 1 3 + 1 5 )]× 5 26 13 4 +7÷( 37 12 - 13 8 ) 408+540÷18×24 46×2.2÷(3.3+5.9)
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(1)[1-(
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(3)408+540÷18×24, =408+30×24, =408+720, =1128; (4)46×2.2÷(3.3+5.9), =46×2.2÷9.2, =101.2÷9.2, =11. |
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