| 4.96-(1.3+2.96) | 5600÷25÷8 | 1 ÷ - ×2![]() |
× + ×![]() | =x:![]() | 2x-3.57+1.43=10. |
(1)4.96-(1.3+2.96),
=4.96-1.3-2.96,
=4.96-2.96-1.3,
=2-1.3,
=0.7;
(2)5600÷25÷8,
=5600÷(25×8),
=5600÷200,
=28;
(3)1
÷
-
×2
,=1
×
-
×
,=(1
-
)×
,=
×
,=
;(4)
×
+
×
,=
×
+
×
,=(
+
)×
,=1×
,=
;(5)
=x:
,x÷
=
,x÷
×
=
×
x=
;(6)2x-3.57+1.43=10,
2x-2.14=10,
2x-2.14+2.14=10+2.14,
2x=12.14,
2x÷2=12.14÷2,
x=6.07.
分析:(1)根据连减的性质进行计算;
(2)根据连除的性质进行计算;
(3)根据乘法分配律进行计算;
(4)根据乘法分配律进行计算;
(5)根据等式的性质进行解答;
(6)根据等式的性质进行解答.
点评:此题主要考查分数、小数的四则混合运算的运算顺序和应用运算定律进行简便计算.