336+28-136= 21X39+87X39-39X9= 48X199÷16= 101X74-74= 怎样用简便计算
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336+28-136
=336-136+28
=200+28
=228
21X39+87X39-39X9
=39X(21+87-9)
=39X100
=3900
48X199÷16
=48÷16X199
=3X(200-1)
=600-3
=597
101X74-74
=74X(101-1)
=74X100
=7400 希望能帮助你,`(*∩_∩*)′
=336-136+28
=200+28
=228
21X39+87X39-39X9
=39X(21+87-9)
=39X100
=3900
48X199÷16
=48÷16X199
=3X(200-1)
=600-3
=597
101X74-74
=74X(101-1)
=74X100
=7400 希望能帮助你,`(*∩_∩*)′
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展开全部
我写给你:
336+28-136
=(336-136)+28
=200+28
=228
21Χ39+87Χ39-39Χ9
=39Χ(21+87-9)
=39Χ99
=39Χ100-39
=3900-39
=3861
48Χ199÷16
=(48÷16)Χ199
=3Χ199
=3Χ200-3Χ1
=600-3
=597
101Χ74-74
=(101-1)Χ74
=100Χ74
=7400
336+28-136
=(336-136)+28
=200+28
=228
21Χ39+87Χ39-39Χ9
=39Χ(21+87-9)
=39Χ99
=39Χ100-39
=3900-39
=3861
48Χ199÷16
=(48÷16)Χ199
=3Χ199
=3Χ200-3Χ1
=600-3
=597
101Χ74-74
=(101-1)Χ74
=100Χ74
=7400
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