第1个回答 2018-08-10
4200÷30= 14
6×1300= 7800
1300×50=65000
200×48= 9600
930-660= 270
530+280= 810
9200÷400= 23
840÷21= 40
180×500= 900000
8000÷500 = 16
1900÷20= 95
17×40＝680,100－63＝37,3.2＋1.68＝4.88,
2.8×0.4＝1.1214－7.4＝6.6,1.92÷0.04＝48,
0.32×500＝160,0.65＋4.35＝510－5.4＝4.6,
4÷20＝0.2,3.5×200＝700,1.5－0.06＝1.44
0.75÷15＝0.05,0.4×0.8＝0.32,4×0.25＝1,
0.36＋1.54＝21.01×99＝99.99,420÷35＝12,
25×12＝300,135÷0.5＝2703/41/4=1,24/9=22/9,3-2/3=7/3,
3/4-1/2=1/41/61/2-1/6=1/2,7.5-(2.53.8)=1.2,
7/83/8=5/43/101/5=1/2,
4/5-7/10=1/10,2-1/6-1/3=1.50.51÷17＝0.03,
32.8＋19＝51.8,5.2÷1.3＝4,1.6×0.4＝0.64
4.9×0.7＝3.43,1÷5＝0.2,6÷12＝0.5,0.87－0.49＝0.38本回答被网友采纳