Most people who multiply mentally are using some form of the distributive property. If you wanted to do something like 47 x 5 in your head, that's (40 x 5) + (7 x 5) = 200 + 35 = 235
To multiply 6 times 198 mentally, you can break down 198 into 200 - 2. Then, use the distributive property: 6 × 198 = 6 × (200 - 2) = (6 × 200) - (6 × 2) = 1200 - 12 = 1188. This approach simplifies the calculation by using easier numbers to multiply.
To multiply 6 times 198 mentally, you can use the expression (6 \times (200 - 2)). This simplifies to (6 \times 200 - 6 \times 2), which equals (1200 - 12 = 1188). This method makes the calculation easier by breaking it down into simpler components.
Do the 2 x 50 first. Get 100. Multiply that by 14.
To multiply 6 times 198 mentally, you can break down 198 into smaller, more manageable parts. For instance, you can express it as ( 198 = 200 - 2 ). Then, rewrite the expression as ( 6 \times 198 = 6 \times (200 - 2) ), which simplifies to ( 6 \times 200 - 6 \times 2 ). This gives you ( 1200 - 12 = 1188 ), making it easier to calculate mentally.
Move the decimal point two spaces to the right.
Ooop
You can do lattice, or do it mentally
To multiply 6 times 198 mentally, you can break down 198 into 200 - 2. Then, use the distributive property: 6 × 198 = 6 × (200 - 2) = (6 × 200) - (6 × 2) = 1200 - 12 = 1188. This approach simplifies the calculation by using easier numbers to multiply.
Do the 2 x 50 first. Get 100. Multiply that by 14.
To multiply 6 times 198 mentally, you can use the expression (6 \times (200 - 2)). This simplifies to (6 \times 200 - 6 \times 2), which equals (1200 - 12 = 1188). This method makes the calculation easier by breaking it down into simpler components.
To multiply 6 times 198 mentally, you can break down 198 into smaller, more manageable parts. For instance, you can express it as ( 198 = 200 - 2 ). Then, rewrite the expression as ( 6 \times 198 = 6 \times (200 - 2) ), which simplifies to ( 6 \times 200 - 6 \times 2 ). This gives you ( 1200 - 12 = 1188 ), making it easier to calculate mentally.
Move the decimal point two spaces to the right.
198 = (200 - 2) so use 6*200 - 6*2
Multiply the number by itself: 2x2=4, 3x3=9 and so on.
To multiply 6 by 198 mentally, you can use the distributive property by breaking down 198 into simpler components, such as 200 and -2. You can then calculate 6 × 200, which equals 1200, and 6 × -2, which equals -12. Adding these results together (1200 - 12) gives you 1188, making it easier to arrive at the final answer without complex calculations.
Multiply by ten and add one of the number. 7 x 11 = 70 + 7 23 x 11 = 230 + 23 = 253.
You need to multiply 300m by 100cm since there are 100cm in a meter. You should be able to solve that mentally.