Su Jiaoban! The third question on page 39 of the first volume of seventh grade mathematics - Training Enrollment Network

Su Jiaoban! The third question on page 39 of the first volume of seventh grade mathematics

(- 1)+(-2)+(-4)+(-8)+8= 1-2-4-8+8=-5

3+(- 1)+(-3)+(-4)=3- 1-3+ 1-4=-4

(minus one and a half)+1.25+(-8.5)+ ten and three quarters = two and seven twelfth.

(2.25)+ one quarter+(minus four and one eighth)+(minus nine tenths) =-2.525.

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