Question

计算;12×45＋15×28＋30×26＋60×11＝

Answer 1

12×45＋15×28＋30×26＋60×11＝15X(12X3+1X28+2X26+4X11)=15X(36+28+52+44)=15X160=2400

Answer 2

12×45＋15×28＋30×26＋60×11＝12X90/2+30/2X28+3X（10X26+20X11）=6X90+30X14+3X(260+220）=540+420+3X480=960+1440=2400

Answer 3

=12x3x15 15x28 15x2x26 15x4x11=15x(36 28 52 44)=15x160=2400

Answer 4

12×45＋15×28＋30×26＋60×11＝60X（9+7+13+11＝）60x40＝2400

Answer 5

2400