(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=