anyone answer these questions
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for 4th one answer is 8/10, fir 3rd one is 40/440,
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1. [42÷(-2)]÷ -7
= -21÷ -7
=3
2.25.4×15.3
=388.62
3.4/5×10/88
=8/88
=1/11
4.56/100÷7/10
=56/100×10/7
=8/10
=0.8
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