3 运动定律与简便运算
用递等式计算,能简算的要简算,写出主要过程.
③ 32×1.25 ②500﹣769.6÷3.7+20
③4
+67.2+5
+32.8 ④(
+
)×18+
×1
⑤
÷(4﹣2.4×
) ⑥1110÷[56×(
﹣
)].
用简便方法计算:
(1)73+3.4+27+5.6 (2)7.25﹣3.42﹣1.58 (3)102×85
(4)363×7+237×7 (5)4300÷25÷4 (6)88×125÷11.
计算,能简算的要写出简算的主要过程.
2.3×1.5+4.5÷0.75
÷[
×(
+
)]
0.7+3.8+4.2+9.3 (
﹣
)÷
+22÷51
2.5:5=
:X
﹣2X=
.
.
﹣
)×15 40%×
+
×
0.125×
+
÷
+12.5%×
.
90.5×99+90.5.
﹣(
﹣
)〕÷
=
÷5+5÷
÷〔
÷(
﹣
)〕= 48×
+3÷7=
÷(
﹣
)= 62.5%×15+2×
﹣5÷8=
﹣
=
×1.2=
÷4= 21
÷7= (
)2=
= 0.4×0.5= 四成+55%= 0.99×9+0.99=
﹣(
﹣
)﹣
⑥
+
﹣
.
﹣
=
+0.75= 1.5﹣
=
÷6= 1÷
﹣
÷7×
= (
+
)×4=
+
)÷
+
﹣(
÷
)].
×(27×
) (2)(
+
+
)÷
÷[(
﹣
)×3] (4)
×
÷
.
(3)25.07﹣4.98 (4)0.125×7
×8.
(2)
(4)
.
÷(1﹣40%)
×8×
×12.5%
(2)(
+
)×
(3)2﹣
÷
﹣
(4)(0.6﹣
)×(
+
)
+
﹣
)×36
÷[
+(
﹣
)×
]
+0.46×
+0.48﹣
.
×[2.4﹣(
+
)]
×15
﹣1.25×15
)÷(1﹣
×1
) (
×0.75+
.
﹣1.65﹣1.35=
×
×
=
÷(5
)]×
= 3.85×
÷
=
÷9+
×
÷[(
﹣
)+(
﹣
)]
+
+
) 80×
÷
×
+1.2×
=
=
=
; (2)
;
; (4)
÷23+
×
+
;
+
)÷
﹣
; (6)3﹣3.79+9.7﹣6.21.
②24×(
+
+
)
÷5+
×
④(0.5﹣
)÷(
)

.
﹣(
﹣
)+
+36×
④0.75﹣
+
﹣(
) ⑥3
+0.6+0.625+
.
+
+
+
④
×[
﹣(
﹣
﹣(
﹣
) ②31.9×18﹣8×31.9 ③
+
+
+
④
﹣
+
.
﹣
÷6;
×
÷(
﹣
);
÷9+
×
; 2﹣
÷
﹣
.
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