$38$

$38$

$211$

$156$

$11$ is de som van $7$ en $4$.

$3$ is het verschil van $7$ en $4$.

$2926$

$2136$

$\mathrm{1600,63}$

$\mathrm{1487,17}$

Doe $9321-2607$ en neem het tegengestelde van het antwoord.

Het antwoord wordt $\text{-}6714$

`text(-)9`

`41`

`text(-)41`

`9`

`text(-)208,9`

`text(-)419,5`

$260$

$26$

$\text{-}56$

$\mathrm{0,71}$

$294$ is het product van $7$ en $42$.

$6$ is het quotiënt van $42$ en $7$.

$24336$

$16$

$101439$

$351$

$\mathrm{39,9776}$

$26$

`134,44`

`text(-)134,44`

`text(-)208,9`

`text(-)419,5`

$1100853$

$13$

$23$ met rest $3$

`46,125`

`57,194`

$2056$

$\text{-}1374$

$\mathrm{14,79}$

$\mathrm{29,99}$

$\mathrm{0,172}$

$\text{-}\mathrm{0,172}$

$2412+8+80+73=2573$, dus $2573-2412=161$.

$\mathrm{5,38}+\mathrm{0,02}+\mathrm{0,60}+\mathrm{0,72}=\mathrm{6,72}$, dus $\mathrm{6,72}-\mathrm{5,38}=\mathrm{1,34}$.

$430$

$2024$

$1266$

$2860$

$88434$

$34$

$\mathrm{73,036}$

$\mathrm{7,6}$

$\text{-}\mathrm{0,0615}$

$\text{-}\mathrm{24,6}$

`98 = 100 - 2` dus `12 xx 98 = 12 xx 100 - 12 xx 2` .

`100xx14 - 3xx14 = 1400 - 42 = 1358`

`115xx100 - 115xx1 = 11500 - 115 = 11358`

$\text{-}\mathrm{6382,6}$

$19646$

$2252$

$\text{-}\mathrm{3,75}$

$\mathrm{0,025}$

$\text{-}70$

$34$

$\mathrm{0,02}$

`101_(text(2)) = 5_(text(10))`

`1100_(text(2)) = 12_(text(10))`

`11001101_(text(2)) = 205_(text(10))`

`101_(text(10)) = 1100101_(text(2))`

`25_(text(10)) = 11001_(text(2))`

`321_(text(10)) = 101000001_(text(2))`

`123_(text(5)) = 38_(text(10))`

`101_(text(8)) = 65_(text(10))`

`156_(text(7)) = 90_(text(10))`

`18,36` .

`text(-)13,26`

`40,3155`

`6,2`

`text(-)4,25 + text(-)4,05 + 1,15 + 1,25 = text(-)5,9` .

`text(-)4,05 - text(-)4,25 = 0,20`

`text(-)4,05 xx text(-)4,25 = 17,2125`

`text(-)4,25 // 1,25 = text(-)3,4`

$554$

$\text{-}6$