计算.①32×18+3060÷36 ②30 1 4 -25.7-4.3 ③2.75+3 4 5 +10.2+1 1 4
计算.①32×18+3060÷36②3014-25.7-4.3③2.75+345+10.2+114④7.8×3.4+745+7.8×535⑤12×(14+16-13)⑥[...
计算.①32×18+3060÷36 ②30 1 4 -25.7-4.3 ③2.75+3 4 5 +10.2+1 1 4 ④7.8×3.4+7 4 5 +7.8×5 3 5 ⑤12×( 1 4 + 1 6 - 1 3 ) ⑥[(4-1 13 15 )÷1.2+1 1 3 ] ÷2 1 3 .
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①32×18+3060÷36 =576+85, =661;
②30 -25.7-4.3 =30 -(25.7+4.3), =30 -30, = ;
③2.75+3 +10.2+1 =2.75+3.8+10.2+1.25, =(2.75+1.25)+(3.8+10.2), =4+14, =18;
④7.8×3.4+7 +7.8×5 =7.8×3.4+7.8+7.8×5.6, =7.8×(3.4+5.6+1), =7.8×10, =78;
⑤12×( + - ) =12× +12× +12× , =3+2+4, =9;
⑥[(4-1 )÷1.2+1 ] ÷2 =[ ÷ + ] ÷ , =[ × + ]× , =[ + ]× , = × , = . |
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