13.6x42.3x3.75—12.5x0.423x28
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13.6x42.3x3.75—12.5x0.423x28
16x14.97÷1996
75x4.67+17.9x2.5
19.98x37+199.8x2.3+9.99x80
1.01+1.04+1.07+···+3.98
0.1+0.3+0.5+···+19.7+19.9
6.03+6.06+6.09+···7.95
0.02+0.04+0.06+0.08+···+0.22+0.24+···+0.96+0.98
16x14.97÷1996
75x4.67+17.9x2.5
19.98x37+199.8x2.3+9.99x80
1.01+1.04+1.07+···+3.98
0.1+0.3+0.5+···+19.7+19.9
6.03+6.06+6.09+···7.95
0.02+0.04+0.06+0.08+···+0.22+0.24+···+0.96+0.98
13.6x42.3x3.75—12.5x0.423x28
=42.5*(13.6*15/4-4.5)
=42.5*(3.4*15-4.5)
=42.5*46.5
=44.5^2-4
=1976.25
16x14.97÷1996
=4*14.96/499
=5984/49900
75x4.67+17.9x2.5
=25*(14.01+1.79)
=25*15.8
=1580/4
=395
19.98x37+199.8x2.3+9.99x80
=19.98*(37+23)+800-0.8
=19.98*60+800-0.8
=1198.8-0.8+800
=1998
=42.5*(13.6*15/4-4.5)
=42.5*(3.4*15-4.5)
=42.5*46.5
=44.5^2-4
=1976.25
16x14.97÷1996
=4*14.96/499
=5984/49900
75x4.67+17.9x2.5
=25*(14.01+1.79)
=25*15.8
=1580/4
=395
19.98x37+199.8x2.3+9.99x80
=19.98*(37+23)+800-0.8
=19.98*60+800-0.8
=1198.8-0.8+800
=1998
13.6x42.3x3.75—12.5x0.423x28
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