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脱式计算.(能简算要简算的)①2×3.6+3.6×7+3.6②1.25×32×25③5.42-(3.75-0.58)④34.7-+65.3-⑤××1×1⑥23×+57÷.
题目详情
| 脱式计算.(能简算要简算的) ①2×3.6+3.6×7+3.6 | ②1.25×32×25 |
| ③5.42-(3.75-0.58) | ④34.7- +65.3-![]() |
⑤ × ×1 ×1![]() | ⑥23× +57÷ . |
▼优质解答
答案和解析
①2×3.6+3.6×7+3.6,
=3.6×(2+7+1),
=3.6×10,
=36;
②1.25×32×25,
=(1.25×8)×(25×4),
=10×100,
=1000;
③5.42-(3.75-0.58),
=(5.42+0.58)-3.75,
=6-3.75,
=2.25;
④34.7-
+65.3-
,
=(34.7+65.3)-(
+
),
=100-1,
=99;
⑤
×
×1
×1
,
=(
×
)×(
×
),
=1×1,
=1;
⑥23×
+57÷
,
=23×
+57×
,
=(23+57)×
,
=80×
,
=30.
=3.6×(2+7+1),
=3.6×10,
=36;
②1.25×32×25,
=(1.25×8)×(25×4),
=10×100,
=1000;
③5.42-(3.75-0.58),
=(5.42+0.58)-3.75,
=6-3.75,
=2.25;
④34.7-
+65.3-
,=(34.7+65.3)-(
+
),=100-1,
=99;
⑤
×
×1
×1
,=(
×
)×(
×
),=1×1,
=1;
⑥23×
+57÷
,=23×
+57×
,=(23+57)×
,=80×
,=30.
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