怎样简便就怎样计算
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(1)58×72+28×58, =(72+28)×58, =100×58, =5800; (2)3000÷125÷8, =3000÷(125×8), =3000÷1000, =3; (3)486-137-63, =486-(137+63), =486-200, =286; (4)432÷54+17×54, =8+918, =926; (5)99×78+78, =(99+1)×78, =100×78, =7800; (6)125×24, =125×(8×3), =(125×8)×3, =1000×3, =3000. |
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