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计算(能简算的要简算.)①(13+57×125)÷[(4-223)×3]②5.6×334+425×3.75③17.8-5.12÷45-3.6.
题目详情
计算(能简算的要简算.)
①(
+
×1
)÷[(4-2
)×3]
②5.6×3
+4
×3.75
③17.8-5.12÷
-3.6.
①(
1 |
3 |
5 |
7 |
2 |
5 |
2 |
3 |
②5.6×3
3 |
4 |
2 |
5 |
③17.8-5.12÷
4 |
5 |
▼优质解答
答案和解析
①(
+
×1
)÷[(4-2
)×3],
=(
+
×
)÷[
×3],
=(
+1)÷4,
=
×
,
=
;
②5.6×3
+4
×3.75,
=5.6×3.75+4.4×3.75,
=3.75×(5.6+4.4),
=3.75×10,
=37.5;
③17.8-5.12÷
-3.6,
=17.8-5.12÷0.8-3.6,
=17.8-6.4-3.6,
=17.8-(6.4+3.6),
=17.8-10,
=7.8.
1 |
3 |
5 |
7 |
2 |
5 |
2 |
3 |
=(
1 |
3 |
5 |
7 |
7 |
5 |
4 |
3 |
=(
1 |
3 |
=
4 |
3 |
1 |
4 |
=
1 |
3 |
②5.6×3
3 |
4 |
2 |
5 |
=5.6×3.75+4.4×3.75,
=3.75×(5.6+4.4),
=3.75×10,
=37.5;
③17.8-5.12÷
4 |
5 |
=17.8-5.12÷0.8-3.6,
=17.8-6.4-3.6,
=17.8-(6.4+3.6),
=17.8-10,
=7.8.
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