(1)2370.4/10= (2)32.785-2.46+70.3= (3)50.32*2.5÷100= (4)38.74*1.1+4.72÷1.23=
(1)7.9*103-0.9*103= (2)6.79÷20+2.3= (20是常數(shù)) (3)28*3.23÷6.519= (4)503.7*1.2-4.7*100=
(1)6.80x103-20= (2)7.234+20-5.28= (3)172.0347+2.1+70-0.01= (4)5.231x2.0÷10=