1. Write in standard form:
(a) 12/(−240):
12−240=−12240=−120(b) (−19)/362:
−19362=−193622. Using appropriate property find −2/3×3/5+5/2×4/7+3/5×1/6:
−23×35+52×47+35×16=−25+107+110=−1470+10070+770=9370=1861403. What should be subtracted from the product of 3/7 and 2/5 to get 4/35?
37×25−435=635−435=2354. One sixth of the students of a class joined the sports club. Three fifth of these students opted to play table tennis. If 6 students play table tennis, how many students are there in the class?
16×35=110 So 10 students are in the class.5. Simplify (10/21×(−7)/5)−(2/3×9/(−16))+((−4)/15×(−6)/16):
1021×−75−23×9−16+−415×−616=−1421+38+110=−23+38+110=−40120+45120+12120=171206. Is 4/11 the multiplicative inverse of −3 3/4? Give reasons.
411×−154=−6044=−1511 Since this result is not equal to 1, 4/11 is not the multiplicative inverse of −3 3/4.
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