递等式计算(能简算的要简算)①(8.5-4)×10.32÷16 ②49×(310÷35+25) ③42×101-42 ④(512+
递等式计算(能简算的要简算)①(8.5-4)×10.32÷16②49×(310÷35+25)③42×101-42④(512+19-38)×72⑤7.6-1.26-1.74...
递等式计算(能简算的要简算)①(8.5-4)×10.32÷16 ②49×(310÷35+25) ③42×101-42 ④(512+19-38)×72 ⑤7.6-1.26-1.74 ⑥(4.2-3.52÷1.6)×1.5.
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推荐于2016-05-11
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①(8.5-4)×10.32÷16,
=4.5×10.32÷16,
=46.44÷16,
=2.9025;
②
×(
÷
+
),
=
×(
×
+
),
=
×(
+
),
=
×(
+
),
=
×
,
=
;
③42×101-42,
=(101-1)×42,
=100×42,
=4200;
④(
+
-
)×72,
=
×72+
×72-
×72,
=30+8-27,
=11;
⑤7.6-1.26-1.74,
=7.6-(1.26+1.74),
=7.6-3,
=4.6;
⑥(4.2-3.52÷1.6)×1.5,
=(4.2-2.2)×1.5,
=2×1.5,
=3.
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