解方程. (1) (2)

解方程。(1)(2)(1) 解:0.6x=9 x=15 (2) 解:0.5x=0.2 x=...

计算.(1)8-15×57÷4 (2)9.6÷3.2+5.1×4 (4)60×

计算.
(1)8-15×57÷4(2)9.6÷3.2+5.1×4(3)49×(310÷35+25)(4)60×(34-23+25)(1)8-15×57÷4,
=8-855÷4,
=8-213.75,
=-205.75;

(2)9.6÷3.2+5.1×4,
=3+20.4,
=23.4;

(3)49×(310÷35+25)
=49×(627...

脱式计算. (1)1300÷25÷4 (2)16×125

脱式计算。(能简算的要简算)(1)1300÷25÷4(2)16×125(1)1300÷25÷4  =1300÷(25×4)  =1300÷100  =13(2)16×125  =2×(8×125)  =2×1000  =2000...