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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 6: tính bằng cách thuận tiện nhất 4.52 * 1.8+ 4.52 * 5.4 + 7.2 * 5.48

Toán Lớp 6: tính bằng cách thuận tiện nhất 4.52 * 1.8+ 4.52 * 5.4 + 7.2 * 5.48

Comments ( 2 )

  1. 4.52 * 1.8+ 4.52 * 5.4 + 7.2 * 5.48
    =4,52 * (1,8+5,4)+7,2 * 5,48
    =4,52 * 7,2+7,2 * 5,48
    =7,2*(4,52+5,48)
    =7,2*10=72.
    Xin hay nhất!

  2. $4.52 x 1.8+ 4.52 x 5.4 + 7.2 x 5.48$
    $=(4.52 x 1.8+ 4.52 x 5.4) + 7.2 x 5.48$
    $=4.52 x (1.8+5.4) + 7.2 x 5.48$
    $=4.52 x 7.2 + 7.2 x 5.48$
    $=7.2 x (5.48 + 4.52)$
    $=7.2 x 10$
    $=72$
     

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222-9+11+12:2*14+14 = ? ( )

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