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(1)0,1,3,6,10,15,(  ),(  ).

(2)60,63,68,75,(  ),(  ).

答案:
解析:

  (1)21 28

  (2)84 95


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0.36÷9= 3.97-2.45= 16×25= 5.2+3.8=
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0.8÷0.1= 0.3+0.36= 1.14×0.2= 7.8÷3=
0.8×15= 0.125×8= 4-1.08= 9×1.8=
1.2×8= 7.82+1.18= 30.5÷2= 1.8×0.2=
0.75÷30= 0.25×3= 4.8+1.2= 0.5×48=
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3×1.2= 2.04×4= 0.72+2.8= 0×3.97=
0.13×80= 18×30= 50×4.1= 0.125×2=
6×0.75= 1.01-0.89= 9.767×0= 0.02×0.3=
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0.84÷0.42= 0.7×0.9= 0.3×400= 5.1÷0.3=
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3.2×0.2= 1.4×0.4= 3.3÷3= 1.2÷0.3= 0.56÷8=
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7×5
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1
6
+
2
5
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2
3
×
3
4
=
1+
1
2
-0.4=
1
4
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1
3
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2
9
=
6
7
÷9=
1
4
+
1
2
=
5
6
×0.4=
8
9
=
1
9
×
1
9
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4
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9
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11
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4
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7
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