计算,能简算的要简算.
①56×(
+
﹣
) ②8.32×101﹣8.32 ③6.75﹣
+3.25﹣
④
÷[
×(
+
)] ⑤(
﹣
)÷(
+
) ⑥(
+25%)÷
+0.7.
解方程
:
=18:x; 3x﹣6
=8.25.
能简便的用简便计算.
798+10570÷35 9.81×0.1+0.5×98.1+0.049×981
(1﹣
×
)÷(
+
)
+
+
…+
+
2008×20092009﹣2009×20082008 2
÷[5
﹣4.5×(20%+
)]
直接写出得数
127+38= 8.8÷0.2= 2﹣1
=
×1
=
1÷7+
= 1﹣1×
=
+
= 1.02﹣0.43=
÷25%×
=
×2÷
×2=
解方程.
(1)30x=4.2
(2)6x÷7=12
(3)3x﹣1.2x=36.
脱式计算,能简算的要简算.
(1)496﹣23×16
(2)2.9×3.6+2.9×6.4
(3)[1﹣(
+
)]×24.