计算 ①6.3×2.8+6.3×7.2 ②10-3.47-1.53 ③512÷1518?16+34 ④450+(8.16+6.84)÷0.63
计算①6.3×2.8+6.3×7.2②10-3.47-1.53③512÷1518?16+34④450+(8.16+6.84)÷0.63⑤(4-7.5×415)÷119⑥7...
计算 ①6.3×2.8+6.3×7.2 ②10-3.47-1.53 ③512÷1518?16+34 ④450+(8.16+6.84)÷0.63 ⑤(4-7.5×415)÷119 ⑥712÷[(14+1.25)×89]-14.
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文爷降临83渵
2014-11-17
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①6.3×2.8+6.3×7.2,
=6.3×(2.8+7.2),
=6.3×10,
=63;
②10-3.47-1.53,
=10-(3.47+1.53),
=10-5,
=5;
③
÷?+,
=
-
+
,
=
+
,
=
;
④450+(8.16+6.84)÷0.63,
=450+15÷0.63,
=450+23
,
=473
;
⑤(4-7.5×
)÷
1,
=(4-2)÷
1,
=2÷
1,
=
;
⑥
÷[(
+1.25)×
]-
,
=
÷[1.5×
]-
,
=
÷
-
,
=
-
,
=
.
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