题目内容
脱式计算. (1)854-3234÷33 |
(2)1.5×(7.02-4.8)+6.67 | ||||||||||||||
(3)
|
(4)
|
分析:(1)先算除法,再算减法;
(2)先算小括号里面的减法,再算括号外的乘法,最后算加法;
(3)按照从左到右的顺序计算;
(4)先把除法变成乘法,再运用乘法分配律简算.
(2)先算小括号里面的减法,再算括号外的乘法,最后算加法;
(3)按照从左到右的顺序计算;
(4)先把除法变成乘法,再运用乘法分配律简算.
解答:解:(1)854-3234÷33,
=854-98,
=756;
(2)1.5×(7.02-4.8)+6.67,
=1.5×2.22+6.67,
=3.33+6.67,
=10;
(3)
×
÷
,
=
×
,
=
;
(4)
×
+
÷
,
=
×
+
×
,
=(
+
)×
,
=1×
,
=
.
=854-98,
=756;
(2)1.5×(7.02-4.8)+6.67,
=1.5×2.22+6.67,
=3.33+6.67,
=10;
(3)
12 |
35 |
5 |
8 |
2 |
7 |
=
3 |
14 |
7 |
2 |
=
3 |
4 |
(4)
7 |
13 |
12 |
17 |
6 |
13 |
17 |
12 |
=
7 |
13 |
12 |
17 |
6 |
13 |
12 |
17 |
=(
7 |
13 |
6 |
13 |
12 |
17 |
=1×
12 |
17 |
=
12 |
17 |
点评:本题考查了四则混合运算,注意运算顺序和运算法则,灵活运用所学的运算定律进行简便计算.
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