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1. 直接写出得数。(16☆)
$12-3.6= $
$1.5-0.06= $
$0.51÷17= $
$5.16÷0.3= $
$0.75÷25= $
$0.36+1.54= $
$4.9×0.7= $
$1.12×0.5= $
$1.01×99= $
$0.669÷0.03= $
$0.32×500= $
$3.5×200= $
$6÷12= $
$2.44×0.2= $
$4-0.78= $
$4×0.25= $
$1.6×0.4= $
$3.33×0.3= $
$0.28-0.19= $
$25×12= $
$0.87-0.49= $
$8÷20= $
$10-5.4= $
$32.8+19= $
$2.8×0.4= $
$1.4×0.6= $
$0.75÷15= $
$1÷5= $
$0.65+4.35= $
$420÷35= $
$2.1×7= $
$3.2+1.68= $
$12-3.6= $
8.4
$1.5-0.06= $
1.44
$0.51÷17= $
0.03
$5.16÷0.3= $
17.2
$0.75÷25= $
0.03
$0.36+1.54= $
1.9
$4.9×0.7= $
3.43
$1.12×0.5= $
0.56
$1.01×99= $
99.99
$0.669÷0.03= $
22.3
$0.32×500= $
160
$3.5×200= $
700
$6÷12= $
0.5
$2.44×0.2= $
0.488
$4-0.78= $
3.22
$4×0.25= $
1
$1.6×0.4= $
0.64
$3.33×0.3= $
0.999
$0.28-0.19= $
0.09
$25×12= $
300
$0.87-0.49= $
0.38
$8÷20= $
0.4
$10-5.4= $
4.6
$32.8+19= $
51.8
$2.8×0.4= $
1.12
$1.4×0.6= $
0.84
$0.75÷15= $
0.05
$1÷5= $
0.2
$0.65+4.35= $
5
$420÷35= $
12
$2.1×7= $
14.7
$3.2+1.68= $
4.88
答案
8.4 1.44 0.03 17.2 0.03 1.9 3.43 0.56 99.99 22.3 160 700 0.5 0.488 3.22 1 0.64 0.999 0.09 300 0.38 0.4 4.6 51.8 1.12 0.84 0.05 0.2 5 12 14.7 4.88
2. 计算下面组合图形的面积。(单位:cm)(22☆)
270 cm²
1360 cm²
20 cm²
66.5 cm²
答案
270 cm² 1360 cm² 20 cm² 66.5 cm²
3. 计算下面各题,能简算的要简算。(12☆)
$1.2×3.9-1.2×0.9$
$2.1×8.64-2.1×6.64$
$4.27×4.7+5.73×4.7$
$1.2×3.9-1.2×0.9$
$2.1×8.64-2.1×6.64$
$4.27×4.7+5.73×4.7$
答案
3.6 4.2 47
