计算.(能简算的要简算)876+1529+124=10-(9.62-2.8)=42.8×4×25=98÷(115÷27)=15÷3+45×13=38÷[(15+14)×38]=-数学
题文
计算.(能简算的要简算) 876+1529+124= 10-(9.62-2.8)= 42.8×4×25= 98÷(
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答案
(1)876+1529+124 =(876+124)+1529, =1000+1529, =2529; (2)10-(9.62-2.8) =10-6.82, =3.18; (3)42.8×4×25 =42.8×(4×25), =42.8×100, =4280; (4)98÷(
=98×
=28×15, =420; (5)
=
=(
=1×
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(6)
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