题目内容
直接写数对又快!
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| 1÷0.1-1×0.1= | 15.4-(5.4-4.5)= | 0.4×0.4= | 402-139= |
(1)
×
÷
×
,
=
×
×
×
,
=
;
(2)
÷
÷
,
=
×8×8,
=8;
(3)
×12.1-1,
=1.1-1,
=0.1;
(4)
+
÷
,
=
+
×5,
=
+2,
=2
;
(5)1÷0.1-1×0.1,
=10-0.1,
=9.9;
(6)15.4-(5.4-4.5),
=15.4-5.4+4.5,
=10+4.5,
=14.5;
(7)0.4×0.4=0.16;
(8)402-139,
=(400+2)-(100+39),
=400-100-(39-2),
=300-37,
=263.
| 5 |
| 9 |
| 1 |
| 5 |
| 5 |
| 9 |
| 1 |
| 5 |
=
| 5 |
| 9 |
| 1 |
| 5 |
| 9 |
| 5 |
| 1 |
| 5 |
=
| 1 |
| 25 |
(2)
| 1 |
| 8 |
| 1 |
| 8 |
| 1 |
| 8 |
=
| 1 |
| 8 |
=8;
(3)
| 1 |
| 11 |
=1.1-1,
=0.1;
(4)
| 3 |
| 5 |
| 2 |
| 5 |
| 1 |
| 5 |
=
| 3 |
| 5 |
| 2 |
| 5 |
=
| 3 |
| 5 |
=2
| 3 |
| 5 |
(5)1÷0.1-1×0.1,
=10-0.1,
=9.9;
(6)15.4-(5.4-4.5),
=15.4-5.4+4.5,
=10+4.5,
=14.5;
(7)0.4×0.4=0.16;
(8)402-139,
=(400+2)-(100+39),
=400-100-(39-2),
=300-37,
=263.
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