题目内容
口算:
| 3.14×2= | 3.14×3= | 3.14×4= | 3.14×5= | 3.14×6= | ||||||||||||
| 3.14×7= | 3.14×8= | 3.14×9= | 3.14×2.7= |
| ||||||||||||
4+
| 2-
|
| 6÷
|
| ||||||||||||
|
| 3.14×2+3.14×0.7=______+______=______. | ||||||||||||||
3.14×2=6.28; 3.14×3=9.42; 3.14×4=12.56; 3.14×5=15.7; 3.14×6=18.84;
3.14×7=21.98; 3.14×8=25.12; 3.14×9=28.26; 3.14×2.7=8.478;
+
=
;
4+
=4
; 2-
=1
;
×
=
; 6÷
=21;
÷5=
;
×
=
;
-
=
; 3.14×2+3.14×0.7=6.28+2.198=8.478.
3.14×7=21.98; 3.14×8=25.12; 3.14×9=28.26; 3.14×2.7=8.478;
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