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用 计 算 器 计 算

用 计 算 器 计 算. 王叔叔的采购清单：. 李阿姨的采购清单：. 尝试用计算器计算. 386 ＋ 179. 825-138. 386. 386. 825. 825. ＋. 386. 825. —. 138. 138. 179. 179. 687. =. 565. =. 先想一想操作的步骤，再说说每步显示器上显示的数据. 26×39. 312÷8. 312. 26. 26. 312. 312. ×. 26. ÷. 39. 39. 8. 8. =. 1014. =. 39. 用计算器计算吧.

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用 计 算 器 计 算

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  1. 用 计 算 器 计 算

  2. 王叔叔的采购清单： 李阿姨的采购清单：

  3. 尝试用计算器计算 386＋179 825-138 386 386 825 825 ＋ 386 825 — 138 138 179 179 687 = 565 =

  4. 先想一想操作的步骤，再说说每步显示器上显示的数据先想一想操作的步骤，再说说每步显示器上显示的数据 26×39 312÷8 312 26 26 312 312 × 26 ÷ 39 39 8 8 = 1014 = 39

  5. 用计算器计算吧 2818＋493= 2800－1798= 3311 1002 76685 2191×35= 3363÷57= 1033－6600 ＋ 76014= 98’7756－5002 －78053－ 21= 70447 59 90’4680 783’3333+10’0872×8= 864’0309 1000’0000÷500÷4000= 5 580’3905÷5－8888= 115’1893 1999’1999÷10001÷1999= 1

  6. 用规律直接写结果： 探究： 9999 × 5= 9999 × 7= 9999 × 9= 49995 9999×1= 9999×2= 69993 9999×3= 89991 探究： 用规律直接写结果： 142857×1= 142857×4= 571428 142857×2= 142857×5= 714285 142857×3= 142857×6= 857142 用计算器探究规律

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