109+502=???
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\(198+789+502+34\)
\(=\left(198+502\right)+\left(789+34\right)\)
\(=700+823\)
\(=1523\)
\(198+789+502+34\)
\(=\left(198+502\right)+\left(766+34\right)-23\)
\(=700+800-23\)
\(=1500-23\)
\(=1477\)
\(50^2-18^2+32^2+100\cdot32\)
\(=\left(32^2-18^2\right)+\left(50^2+100\cdot32\right)\)
\(=\left(32+18\right)\left(32-18\right)+50\cdot\left(50+2\cdot32\right)\)
\(=50\cdot14+50\cdot114\)
\(=50\cdot128\)
\(=6400\)
\(=\dfrac{62500}{502:\left[112-52+115\right]}=\dfrac{62500}{502:175}\simeq21787,84861\)
\(62500:\left\{502:\left[112-\left(52-23.5\right)\right]\right\}\\ =62500:\left\{502:\left[112-\left(52-115\right)\right]\right\}\\ =62500:\left\{502:\left[112-\left(-63\right)\right]\right\}\\ =62500:\left\{502:175\right\}\\ =62500:\dfrac{502}{175}\\ =21787,84861\)
109+502=611
duyet nha
109 + 502 = 611 Bạn k cho mình nha!*****