Видео с ютуба Big Friend Formula

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Abacus: Big Friend Formula (Addition/Subtraction)

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Abacus Subtraction Trick | -2 = -10 + 8 Big Friend Formula Explained | Easy Mental Maths for Kids

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Learn Big Friend Friend Formula ( +8 = +10 - 2 )👍|When & how to use ( +8 = +10 - 2 )|Level 1 abacus👆

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Big Friend Formula Abacus in Hindi ||Addition and Substraction ||Abacus ||Level 1 ||Fast Calculation

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Big Friends Subtraction in Abacus//Abacus lesson -10

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FINGER ABACUS (-2 BIG FRIEND FORMULA) -FINGER ABACUS FIRST LEVEL FREE COURSE

Big Friend Formula +6