题目内容
下面各题怎样简便就怎样计算(求未知数X).
5.02-1.37-2.63
×(
+
)+0.8
:X=0.32:4.8
1.25×2.5×32
11÷〔
×(
+
)〕
5.02-1.37-2.63
| 12 |
| 5 |
| 5 |
| 6 |
| 1 |
| 2 |
| 1 |
| 5 |
1.25×2.5×32
11÷〔
| 6 |
| 11 |
| 3 |
| 4 |
| 1 |
| 6 |
(1)5.02-1.37-2.63;
=5.02-(1.37+2.63),
=5.02-4,
=1.02;
(2)
×(
+
)+0.8,
=
×
+
×
+0.8,
=2+1.2+0.8,
=2+(1.2+0.8),
=2+2,
=4;
(3)
:x=0.32:4.8,
0.32x=0.2×4.8,
0.32x=0.96,
0.32x÷0.32=0.96÷0.32,
x=3;
(4)1.25×2.5×32,
=(1.25×8)×(2.5×4),
=10×10,
=100;
(5)11÷[
×(
+
)],
=11÷[
×
],
=11÷
;
=22.
=5.02-(1.37+2.63),
=5.02-4,
=1.02;
(2)
| 12 |
| 5 |
| 5 |
| 6 |
| 1 |
| 2 |
=
| 12 |
| 5 |
| 5 |
| 6 |
| 12 |
| 5 |
| 1 |
| 2 |
=2+1.2+0.8,
=2+(1.2+0.8),
=2+2,
=4;
(3)
| 1 |
| 5 |
0.32x=0.2×4.8,
0.32x=0.96,
0.32x÷0.32=0.96÷0.32,
x=3;
(4)1.25×2.5×32,
=(1.25×8)×(2.5×4),
=10×10,
=100;
(5)11÷[
| 6 |
| 11 |
| 3 |
| 4 |
| 1 |
| 6 |
=11÷[
| 6 |
| 11 |
| 11 |
| 12 |
=11÷
| 1 |
| 2 |
=22.
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