问题
解答题
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÷(
÷1 15
)2 7
=98×
÷2 7
,1 15
=28×15,
=420;
(5)
÷3+1 5
×4 5 1 3
=
×1 5
+1 3
×4 5
,1 3
=(
+1 5
)×4 5
,1 3
=1×
,1 3
=
;1 3
(6)
÷[(3 8
+1 5
)×1 4
]3 8
=
÷3 8
÷(3 8
+1 5
),1 4
=1÷
,9 20
=
.20 9