Question

14×7	2.8-0.4	1.2×0.5	0.12÷4
0.22×0.2	0.15÷0.3	43+15	2.2-1.5
0.46+0.6	2-1.7	4.1+0.04	3.5-3
20+160	210÷30	30×20	600÷20
21×40	110-60	44×25	201×14
1 4 - 1 5	3 5 + 3 4	5 9 ÷ 5 7	2 3 × 1 2
5 8 ÷ 3 8	5× 2 9 ×20%	50%+ 1 3 + 1 6	5- 9 16 ×8
6 7 ÷ 3 5 ×7	2 9 × 4 9 ×9．

Answer 1

分析：根據(jù)整數(shù)、分?jǐn)?shù)、小數(shù)和百分?jǐn)?shù)加減乘除法的運(yùn)算方法進(jìn)行解答即可．

解答：解：

14×7=98	2.8-0.4=2.4	1.2×0.5=0.6	0.12÷4=0.03
0.22×0.2=0.044	0.15÷0.3=0.5	43+15=58	2.2-1.5=0.7
0.46+0.6=1.06	2-1.7=0.3	4.1+0.04=4.14	3.5-3=0.5
20+160=180	210÷30=7	30×20=600	600÷20=30
21×40=840	110-60=50	44×25=1100	201×14=2814
1 4 - 1 5 = 1 20	3 5 + 3 4 = 27 20	5 9 ÷ 5 7 = 7 9	2 3 × 1 2 = 1 3
5 8 ÷ 3 8 = 5 3	5× 2 9 ×20%= 2 9	50%+ 1 3 + 1 6 =1	5- 9 16 ×8= 1 2
6 7 ÷ 3 5 ×7=10	2 9 × 4 9 ×9= 8 9

點評：此題考查了四則運(yùn)算的口算方法和口算能力，認(rèn)真計算即可．